Rotary grate for gas-producers.



E. HILGER. ROTARY (.TRATB FOR GAS PRODUCERS.

APPLIGATiON 11,111] DBO. 2, 1909.

0 1 9 1 mm 1 g u A d m H ,w a P ion ERNEST HXIJG'EBI, h DU'SSELD QRF,GERMANY.

noranr snare non easraonucnns;

Specification of Letters Patent. Patented Aug-u .16, 1%10,

application filed. December 2, was. serial No. 5230,9091.

whom it may concern:

To oll it known that l, Enivnsr HILonn, a

' citizen of the German Empire, and a resia ward]. oaenin zi r--za airplate (1 supported upon suitable brackets f all grate constructed inaccordance with dent of Dusseldorf, Germany, have invented a new andImproved Rotary Grate for Gas- Producers, of which the followingis aspecification. r

This invention relates-to rotary grates for gas producers and comprisesmore essentially a stellated hood crowning a similarly shaped base insuch a manner that a down inlet is formed between said hood and base.

The accompanying drawings illustrate a this invention; wherein--- Figure1 shows '11 vertical central section the lower part of the producertogether with the grate, and Fig. 2 shows a top plan view of the furnaceplate.

The gas producer a is provided at its bot tom. with a rotary grate whichcomprises essentially a coniform base f having a stellated head f. Thelatter is overlapped by a stellated slightly tapering spaced hood or insuch a manner that a star-like downcontinuous passage is formed throughwhich the air escapes in the direction of the arrows at (Fig. 1). Uwingto the peculiar shape of the air passage, an annular space 6 is swept bythe air when the grate is rotated. The plate 0 projects considerablybeyond the portion of the grate immediately below it, thus entirelypreventingthe entry of the producer charge into the internal air-spaceof the grate, a defect common to all the various constructionsheretofore made. The somewhat considerahle loss of fuel and theinequality in the air-supply,- which have resulted in the unsatisfactoryworking which has hereto-- fore resulted from the choking of theairspace are consequently both eliminated in apparatus according, tothis invention.

In such apparatus the charge falls loosely to the line -h while the aircan enter freely at d into the loosely-disposed mass.

wardly opening This invention moreover prevents fuel from burning up toorapidly to a great height at the center of the producer, and the toorapid gasification of the fuel at the edge of grate, as well as theburning away ofthis ed e. The Suppl of air is thus considerab yfacilitated w ile the slay can moreover be much more easily removed thanin other -not rotate continuously in the same direction in relation tothe casing, but is moved forward through a certain determinate angle andthen again backward through a fraction of this angle. This kind ofmovement considerably facilitates the descent of the loose slag and alsofacilitates the action of the projections of the furnace plate upon thecompact accumulations ofslag, as, when t e laid are and caused to fallintothe ashpit, while the compact slag which adheres to the side of thecasing, has tobear the weight of exposed to considerable pressure. Whennow the grate moves forward, it,'or more correctly speaking, its pointsor projections will first movethrough a space or clearance producedthrough the descent of the loose slag and will then come in contact withthe compact slag with the result that the slag, which at the same timehas to support the weight of the charge of fuel lying over it, is brokenup, and especiall during the last rearward movement of the grate,detached by the points of the plate.

lfhe peculiar movement of the described results therefore first in theformation of a hollow space through the descent of the loose slag andsecbndly in an attack on the coin act slag on the sides of the casingfrom t e one side during the rearward movement of the grate and stillmore'ener- 'getically on the some portion of slag from the other sideduring the subsequent forward movement of the grate. The movement of thegrate and casing relatively to each other may in some cases be effectedin such manner that the grate and casingboth move in oppositedirections.

The peculiar movement of the grate already described may be effected byany suit able means. In Fig. 1; the grate is shown surrounded by a ringis which is provided lower edge, with which teeth there-meshrespectivelythe bevel wheels m and Z; these wheels being alternatelybrought into ongagement with the ring it lever 01 and s 2 r 2 l v In theexample of apparatus shown in Fig. 1 of the drawings the reversal of thebevel movement of the rotary grate is shown as efthe charge lying overit and is consequently rate just with bevel teeth on its upper and onits by means of the being actuated through spur from fast and loosepulleys 0.

teeth together with the forward and rearward constructions especially asthe grate does %:"ate moves backward the loose slag is fected by themanual operation of the lever n. This however is done only for thepurpose of rendering clear the 0 eration of the apparatus. In practiceit wi l of course be more advantageous in almostall cases to effect thereversal by automatic means in such manner that after the grate has beenmoved forward through a certain determinate angle in one direction itismoved backward to a lesser extent in the opposite direction.

lVhat I claim is 1. In a device of the character described, a rotarygrate comprising a hollow base having a stellated head, and a spacedstellated hood that overlaps said head to form a star-like downwardlyopening continuous air passage.

2. In a device of the character described, a grate comprising a hollowconiform base having a stellated head, a spaced stellated hood thatoverlaps said head to form a starlike downwardly opening continuous airspaced stellated slightly tapering hood that overlaps said head to forma star-like downwardly opening continuous air passage.

4. In a device of the character described, a rotary grate comprising ahollow coniform base having a stellatcd head, brackets on said head, anda stellated hood supported on said brackets and overlappii ig the headto form a star-like downwardly opening continuous air passage.

In testimony whereof I aflix my signature in presence of two witnesses.

ERNEST HILGER. [L.S.] Witnesses CIIAs. J. VVareirr, OTTo Rome.

